body {
    /*align-items: center;*/
    /*background-color: var(--white);*/
    /*!*background: url("https://res.cloudinary.com/dbhnlktrv/image/upload/v1599997626/background_oeuhe7.jpg");*!*/
    /*background: linear-gradient(to left top,var(--lm-main-bg1), var(--lm-main-bg2));;*/
    /*!* 决定背景图像的位置是在视口内固定，或者随着包含它的区块滚动。 *!*/
    /*!* https://developer.mozilla.org/zh-CN/docs/Web/CSS/background-attachment *!*/
    /*background-attachment: fixed;*/
    /*background-position: center;*/
    /*background-repeat: no-repeat;*/
    /*background-size: cover;*/
    /*display: grid;*/
    /*height: 100vh;*/
    /*place-items: center;*/
}

.form__title {
    font-weight: 30;
    margin: 0;
    margin-bottom: 1.75rem;
}

.link {
    color: var(--gray);
    font-size: 0.9rem;
    margin: 1.5rem 0;
    text-decoration: none;
}

.container {
    background-color: var(--white);
    border-radius: var(--button-radius);
    box-shadow: 0 0.9rem 1.7rem rgba(0, 0, 0, 0.25),
    0 0.7rem 0.7rem rgba(0, 0, 0, 0.22);
    top: 60px;
    height: 600px;
    max-width: 80%;
    overflow: hidden;
    left: 10%;
    position: relative;
    width: 100%;
}

.container__form {
    height: 100%;
    position: absolute;
    top: 0;
    transition: all 0.6s ease-in-out;
}

.container--signin {
    left: 0;
    width: 50%;
    z-index: 2;
}

.container.right-panel-active .container--signin {
    transform: translateX(100%);
}

.container--signup {
    left: 0;
    opacity: 0;
    width: 50%;
    z-index: 1;
}

.container.right-panel-active .container--signup {
    animation: show 0.6s;
    opacity: 1;
    transform: translateX(100%);
    z-index: 5;
}

.container__overlay {
    height: 100%;
    left: 50%;
    overflow: hidden;
    position: absolute;
    top: 0;
    transition: transform 0.6s ease-in-out;
    width: 50%;
    z-index: 100;
}

.container.right-panel-active .container__overlay {
    transform: translateX(-100%);
}

.overlay {
    background-image: linear-gradient(to left top, var(--lm-main-bg1), var(--lm-main-bg2));
    /*background-color: linear-gradient(to left top, var(--lm-main-bg1), var(--lm-main-bg2));*/
    /*background: url("https://cdn.pixabay.com/photo/2018/08/14/13/23/ocean-3605547_1280.jpg");*/
    background-attachment: fixed;
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
    height: 100%;
    left: -100%;
    position: relative;
    transform: translateX(0);
    transition: transform 0.6s ease-in-out;
    width: 200%;
}

.container.right-panel-active .overlay {
    transform: translateX(50%);
}

.overlay__panel {
    align-items: center;
    display: flex;
    flex-direction: column;
    height: 100%;
    justify-content: center;
    position: absolute;
    text-align: center;
    top: 0;
    transform: translateX(0);
    transition: transform 0.6s ease-in-out;
    width: 50%;
}

.overlay--left {
    transform: translateX(-20%);
}

.container.right-panel-active .overlay--left {
    transform: translateX(0);
}

.overlay--right {
    right: 0;
    transform: translateX(0);
}

.container.right-panel-active .overlay--right {
    transform: translateX(20%);
}

.btn {
    /*background-color: #03e9f4;*/
    background-image: linear-gradient(90deg, var(--blue) 0%, var(--lm-text-pure) 74%);
    border-radius: 20px;
    border: 1px solid var(--blue);
    color: var(--white);
    cursor: pointer;
    font-size: 1.0rem;
    font-weight: bold;
    letter-spacing: 0.1rem;
    padding: 0.9rem 4rem;
    text-transform: uppercase;
    transition: transform 80ms ease-in;
}

.form>.btn {
    margin-top: 1.5rem;
}

.btn:active {
    transform: scale(0.95);
}

.btn:focus {
    outline: none;
}

.form {
    background-color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    padding: 0 3rem;
    height: 100%;
    text-align: center;
}


@keyframes show {

    0%,
    49.99% {
        opacity: 0;
        z-index: 1;
    }

    50%,
    100% {
        opacity: 1;
        z-index: 5;
    }
}